Author: Robert Hyatt
Date: 06:05:15 02/16/98
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On February 16, 1998 at 05:45:04, Baier Helfried wrote: >On February 12, 1998 at 09:35:00, Robert Hyatt wrote: > > >> >> >>Actually, almost all of the 4 piece files are not needed. KQQK is >>obviously >>one. But deleting them causes one embarassing problem: If you reach a >>KQPK ending, it will see "mate in N" from that tablebase. But once it >>pushes the pawn to the 7th, it might not promote it if the KQQK >>tablebase is >>not available. It is possible it can't see deeply enough to see the >>mate >>in a blitz game (should be no problem in normal time controls). What >>will >>happen is that it will check like mad with the queen, which keeps it in >>the tablebase and keeps it seeing "mate in N". It will do this until >>either a repetition threat or 50-move rule forces it to promote to avoid >>the draw score. >> >>So it would probably win, but not "prettily". And it is possible that >>by >>the time it checks for 50 moves, it can't get back to the right position >>where it can force the promotion without repeating for a third time. >> >>bottom line: keep 'em all, only 250mb. Disk is cheap. :) > >Oh, I understand. 4 piece files are only 'little' tools for the 5 piece >files. >But where can I find this 5 piece files? For example KNN-kp >On ftp://news.cis.uab.edu/pub/hyatt/TB/ >I could find only some of this. all I have at present is on that machine. I'm working on another 12 gigs of disk for doing more of these... but not yet..
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